PRTG Manual: Port v2 Sensor

Enabled Beta Sensors experimental feature

• This sensor requires that the Beta Sensors experimental feature is enabled.

For more information, see the Knowledge Base: What are beta sensors and how can I use them?

IPv6

• This sensor supports IPv6.

Performance impact

• This sensor has a very low performance impact.

Scanning interval

• This sensor has a fixed minimum scanning interval for performance reasons. You cannot use a shorter scanning interval. Consequently, shorter scanning intervals in the Monitoring settings are not available for this sensor.

• The minimum scanning interval of this sensor is 1 minute.

• The recommended scanning interval of this sensor is 5 minutes.

Multi-platform probe

• You can add this sensor to a multi-platform probe.

Goal

Define how the sensor reports on the ports:

• Open: Shows the Up status if the port is open, and the Down status if the port is closed.
• Closed: Shows the Up status if the port is closed, and the Down status if the port is open.

You can modify the limits in the channel settings to change the sensor behavior. For more information, see section Channel Settings.

Timeout (Sec.)

Enter a timeout in seconds for the request. Enter an integer. The maximum timeout value is 900 seconds (15 minutes).

If the reply takes longer than this value, the sensor cancels the request and shows a corresponding error message.

Port-by-Port Delay (ms)

Define how long the sensor waits before it tries to connect to the next port. The maximum delay value is 100 ms.

Port List

Enter the port numbers that the sensor tries to connect to. Enter one port number per line. PRTG supports the port numbers 1 - 65535. You can also specify port ranges by using A-B, for example 8080-8090. Enter an integer.

Primary Channel

Select a channel from the list to define it as the primary channel. In the device tree, PRTG displays the last value of the primary channel below the sensor's name. The available options depend on what channels are available for this sensor.

You can set a different primary channel later by clicking below a channel gauge on the sensor's Overview tab.

Graph Type

Define how this sensor shows different channels:

• Show channels independently (default): Show a graph for each channel.
• Stack channels on top of each other: Stack channels on top of each other to create a multi-channel graph. This generates a graph that visualizes the different components of your total traffic.
  You cannot use this option in combination with manual Vertical Axis Scaling (available in the channel settings).

Stack Unit

This setting is only visible if you select Stack channels on top of each other above.

Select a unit from the list. PRTG stacks all channels with this unit on top of each other. By default, you cannot exclude single channels from stacking if they use the selected unit. However, there is an advanced procedure to do so.

Result Handling

Define what PRTG does with the sensor result:

• Discard result: Do not store the sensor result.

• Store result: Store the last sensor result in the \Logs\sensors subfolder of the PRTG data directory on the probe system. The file name is Result of Sensor [ID].log. This setting is for debugging purposes. PRTG overwrites this file with each scanning interval.

This option is not available when the sensor runs on the hosted probe of a PRTG Hosted Monitor instance.

Closed Ports

The number of closed ports

Downtime

In the channel table on the Overview tab, this channel never shows any values. PRTG uses this channel in graphs and reports to show the amount of time in which the sensor was in the Down status

Errors

The number of errors

This channel has a default limit:

• Upper error limit: 0

Maximum Connect Time

The maximum time until a request to connect to a port was accepted

This channel is the primary channel by default.

Open Ports

The number of open ports